chore(deps): Update PHPStan packages to v2.0.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
phpstan/phpstan	2.0.3 -> 2.0.4
phpstan/phpstan-phpunit	2.0.1 -> 2.0.2
phpstan/phpstan-strict-rules	2.0.0 -> 2.0.1

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Release Notes

phpstan/phpstan (phpstan/phpstan)

v2.0.4

Compare Source

phpstan/phpstan-phpunit (phpstan/phpstan-phpunit)

v2.0.2

Compare Source

• 2cedfb7 - Merge remote-tracking branch 'origin/1.4.x' into 2.0.x
• 10880da - Implement AssertEqualsIsDiscouragedRule (#​216)
• 4b6ad7f - Fix
• bec49ea - Merge branch '1.4.x' into 2.0.x
• 3cc8554 - Fixes after PHPStan update
• 09e2d3b - Uncover everything behind the bleedingEdge flag
• 4d861e0 - Fix after TypeSpecifier BC break
• 3faa605 - Update build-cs
• 953195d - Stop testing PHP 7.2 and 7.3
• 7f1457f - Open 2.0.x

phpstan/phpstan-strict-rules (phpstan/phpstan-strict-rules)

v2.0.1

Compare Source

• ed6fea0 - Added strictRulesInstalled parameter

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